JP2019059029A - Nozzle surface wiping device for liquid droplet discharge head and liquid droplet discharge device - Google Patents

Abstract

To provide a nozzle surface wiping device for a liquid droplet discharge head and a liquid droplet discharge device capable of reducing redundancies of a wiping member, compared with a mechanism in which a cleaning liquid is supplied to the wiping member upstream of a rotary roll in a wiping member supply direction, which rotary roll brings the wiping member into contact with the nozzle surface of the liquid droplet discharge head.SOLUTION: Provided is a nozzle surface wiping device 40 for a liquid droplet discharge head 20, the nozzle surface wiping device comprising: a wiping member 60 which is configured to be movable in a supply direction and an opposite rewind direction, and which wipes a nozzle surface 21 of the liquid droplet discharge head 20 as it moves relative to the liquid droplet discharge head 20; a rotary roll 50 which contacts the wiping member 60 from below and brings the wiping member 60 into contact with the nozzle surface 21 while rotating; and supply means 64 for supplying a cleaning liquid S to the rotary roll 50.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a nozzle surface wiping device for a droplet discharge head and a droplet discharge device.

  A wiping web for wiping the nozzle surface of the ink jet recording head (droplet discharge head), a traveling drive means for causing the wiping web to travel, a roll for pressing the wiping web against the nozzle face, and a traveling of the wiping web from the roll A nozzle surface wiping apparatus provided with a cleaning liquid deposition nozzle for applying a cleaning liquid to an appropriate position on the upstream side in the direction has been conventionally proposed (see, for example, Patent Document 1).

JP, 2014-15021, A

  The present invention can reduce waste of the wiping member compared to the case where the cleaning liquid is supplied to the wiping member on the upstream side of the rotating direction of the wiping member with respect to the nozzle surface of the droplet discharge head. An object of the present invention is to obtain a nozzle surface wiping device and a droplet discharge device for a droplet discharge head.

  In order to achieve the above object, the nozzle surface wiping apparatus for a droplet discharge head according to claim 1 of the present invention is configured to be movable in a delivery direction and a reverse direction opposite to that. A wiping member for wiping the nozzle surface of the droplet discharge head with relative movement with the head, and a rotating roll for bringing the wiping member into contact with the nozzle surface while rotating in contact with the wiping member from below And supply means for supplying a cleaning liquid to the rotating roll.

  The nozzle surface wiping device for a droplet discharge head according to claim 2 is the nozzle surface wiping device for a droplet discharge head according to claim 1, wherein the lower side of the rotating roll is immersed in the supply means. It is comprised by the storage member which stores the said washing | cleaning liquid as possible.

  The nozzle surface wiping apparatus for a droplet discharge head according to claim 3 is the nozzle surface wiping apparatus for a droplet discharge head according to claim 2, wherein the supply means is the nozzle surface of the wiping member. The lower part of the rotating roll is immersed in the cleaning liquid by being pressed relative to the lower part.

  A droplet discharge apparatus according to a fourth aspect of the present invention is the nozzle surface wiping apparatus according to any one of the first to third aspects, and the rewinding with respect to the nozzle surface wiping apparatus. The droplet discharge head relatively moving in the direction, and the lower surface having a length equal to or more than the circumferential length of the rotating roll are disposed adjacent to the droplet discharge head so that the same height position as the nozzle surface is provided. And a frame member in contact with the wiping member continuously with relative movement of the droplet discharge head.

  The droplet discharge device according to a fifth aspect of the present invention is the nozzle surface wiping device according to any one of the first to third aspects, and the rewinding with respect to the nozzle surface wiping device. The droplet discharge head relatively moving in the direction, and the lower surface having a length shorter than the circumferential length of the rotating roll are disposed adjacent to the droplet discharge head so that the same height position as the nozzle surface And a frame member which is in contact with the wiping member continuously with relative movement of the droplet discharge head.

  A droplet discharge apparatus according to claim 6 is the droplet discharge apparatus according to claim 4 or 5, wherein the droplet discharge head is started when wiping of the nozzle surface of the droplet discharge head is started. And a second boundary between the used area and the unused area of the wiping member is disposed at the first boundary between the nozzle surface of the nozzle and the lower surface of the frame member, and the wiping member is delivered more than the second boundary. The movement of the wiping member with respect to the frame member is controlled so that the range downstream of the wiping member in the feeding direction downstream of the portion to which the cleaning liquid is supplied by the supply means is wetted by the cleaning liquid Control unit is provided.

  The droplet discharge device according to claim 7 is the droplet discharge device according to claim 6, wherein the control unit is configured to move the second boundary after wiping of the nozzle surface of the droplet discharge head is completed. The movement of the wiping member is controlled so that the unit is positioned at a predetermined delivery position.

  According to the first aspect of the present invention, the wiping member is wiped in comparison with the case where the cleaning liquid is supplied to the wiping member on the upstream side in the delivery direction of the wiping member than the rotating roll which brings the wiping member into contact with the nozzle surface Waste of members can be reduced.

  According to the second aspect of the present invention, it is possible to supply the cleaning liquid to the rotating roll without spots, for example, as compared to the case where the cleaning liquid is sprayed and supplied to the lower part of the rotating roll.

  According to the third aspect of the present invention, the cleaning liquid can be easily supplied to the rotating roll as compared to the case where the storage member is raised by the elevating mechanism to supply the cleaning liquid to the lower part of the rotating roll, for example.

  According to the fourth aspect of the present invention, it is possible to easily adjust the wiping start position of the wiping member with respect to the nozzle surface as compared to the case where the length of the lower surface of the frame member is shorter than the circumferential length of the rotating roll.

  According to the fifth aspect of the present invention, the droplet discharge device can be made compact as compared with the case where the length of the lower surface of the frame member is equal to or longer than the circumferential length of the rotating roll.

  According to the invention of claim 6, compared with the case where the wiping operation is started in a state where the second boundary (the downstream end wetted by the cleaning liquid) does not reach the first boundary, waste of the wiping member Can be reduced.

  According to the invention of claim 7, compared to the case where the wiping member is moved so that the second boundary portion is positioned at the predetermined delivery position at the next maintenance, up to the start of the wiping at the time of the next maintenance The waiting time can be shortened.

FIG. 2 is a side view showing the configuration of the ink jet recording apparatus according to the present embodiment. It is a front view showing a nozzle surface wiping device concerning this embodiment. (A) It is a side view which shows the support roll and storage member of a nozzle surface wiping device. (B) It is a front view which shows the state before a wiping member is wound by a support roll. (C) It is a front view which shows the state after the wiping member was wound by the support roll. It is explanatory drawing which shows the process of adjusting the wiping start position of the wiping member in a nozzle surface wiping apparatus. It is explanatory drawing which shows the process of adjusting the wiping start position of the wiping member in a nozzle surface wiping apparatus. It is an explanatory view showing the state where the wiping member in nozzle side wiping device was adjusted to the wiping start position. It is explanatory drawing which shows the state which is wiping the nozzle surface by the wiping member in a nozzle surface wiping apparatus. It is explanatory drawing which shows the process after wiping off a nozzle surface by the wiping member in a nozzle surface wiping device. It is a front view which expands and shows a part of nozzle surface wiping device which concerns on a comparative example.

  Hereinafter, embodiments of the present invention will be described in detail based on the drawings. For convenience of explanation, an arrow UP appropriately shown in each drawing is taken as an upward direction of the ink jet recording apparatus 10 as an example of the droplet discharge apparatus. Also, in the following, the conveyance direction of the recording paper P as an example of the recording medium is simply referred to as “conveyance direction”, and the conveyance direction upstream side and the conveyance direction downstream side are simply referred to as “upstream side” and “downstream side”, respectively. There is a case to say.

<Ink jet recording apparatus>
As shown in FIG. 1, the inkjet recording apparatus 10 includes a sheet feeding unit 12 in which the recording sheet P is stored, an image recording unit 14 that records an image on the recording sheet P fed from the sheet feeding unit 12, and an image. The image forming apparatus 1 includes conveyance means 16 for conveying the recording sheet P to the recording section 14 and a sheet discharge section 18 for storing the recording sheet P on which the image is recorded by the image recording section 14.

  The image recording unit 14 includes an inkjet recording head 20 as an example of a droplet discharge head. The ink jet recording head 20 has a nozzle surface 21 (see FIG. 2) on which a plurality of nozzles (not shown) are formed, and the nozzle surface 21 is a recording where image recording with the ink jet recording apparatus 10 is assumed. It has a recordable area equal to or larger than the maximum width of the sheet P.

  The inkjet recording head 20 is arranged in the order of yellow (Y), magenta (M), cyan (C), and black (K) from the upstream side in the conveyance direction of the recording paper P, and thermal The ink droplet (droplet) is ejected by a known means such as a method or a piezoelectric method.

  As the ink, various inks such as water-based ink, oil-based ink and solvent-based ink can be used. Further, the ink jet recording apparatus 10 is provided with ink tanks 22Y, 22M, 22C, 22K for supplying ink to the ink jet recording heads 20Y, 20M, 20C, 20K.

  On the other hand, a plurality of recording sheets P stored in the sheet feeding unit 12 are configured to be taken out one by one by the pickup roller 24, and conveyed to the image recording unit 14 by the conveyance roller pair 25. It is configured.

  The conveyance means 16 has a conveyance belt 30 for causing the printing surface of the recording paper P to face the nozzle surface 21 of the ink jet recording head 20 at a predetermined interval (for example, about 1 mm). The conveyance belt 30 is stretched between a drive roller 26 disposed on the downstream side and a driven roller 28 disposed on the upstream side, and is configured to circulate and drive (rotate) in the illustrated arrow A direction. .

  Further, on the upper side of the driven roller 28, a charging roller 32 which is driven by the conveying belt 30 from the surface side of the conveying belt 30 is disposed. The conveyance belt 30 is charged (charged) by the charging roller 32 so that the recording sheet P is electrostatically attracted to the conveyance belt 30 and conveyed.

  The conveyance belt 30 is not limited to the one configured to hold the recording sheet P by electrostatic attraction and is held, and may not be static, such as friction with the recording sheet P or suction or adhesion of the recording sheet P. It may be configured to be held by an electrostatic adsorption means. Further, on the downstream side of the transport belt 30, a plurality of transport roller pairs 35 and a plurality of transport roller pairs 38 are disposed.

  Further, a reversing unit 34 is provided below the conveyance belt 30. Therefore, when duplex printing is performed, the recording paper P transported by the transport roller pair 35 is further transported by the plurality of transport roller pairs 36 of the reversing unit 34 and is again transported to the ink jet print head 20. The recording paper P on which the image is recorded is peeled off from the conveyance belt 30, conveyed by the conveyance roller pair 35 and the conveyance roller pair 38, and discharged to the paper discharge unit 18.

  In the inkjet recording apparatus 10, a head control unit (not shown) of the inkjet recording head 20 which determines the ejection timing of the ink droplet and the nozzle to be used according to the image signal and applies a drive signal to the nozzle. A system control unit 23 as an example of a control unit that controls the overall operation of the inkjet recording apparatus 10 is provided.

<Nozzle surface wiping device and frame member>
Next, in the inkjet recording apparatus 10 configured as described above, the nozzle surface wiping apparatus 40 for cleaning the nozzle surface 21 of the inkjet recording head 20 and the frame member 70 provided adjacent to the inkjet recording head 20 will be described next. Do.

  As shown in FIGS. 4 to 8, the inkjet recording head 20 is configured to be movable in the longitudinal direction (the width direction of the recording paper P) by a known moving mechanism such as a rack and pinion and a slide guide. . More specifically, the inkjet recording head 20 can be retracted from the image recording unit 14 (on the transport means 16), and can be moved to a maintenance unit (not shown) disposed next to the image recording unit 14 It is configured.

[Nozzle surface wiping device]
The nozzle surface wiping device 40 is configured to be capable of moving up and down in the maintenance section, and is configured to be immovable in the longitudinal direction of the inkjet recording head 20. Therefore, when the nozzle surface 21 of the inkjet recording head 20 is wiped, the nozzle surface wiping device 40 ascends so that the wiping member 60 is in contact with the nozzle surface 21. In this state, the inkjet recording head 20 wipes the nozzle surface The nozzle surface 21 is wiped by the wiping member 60 by moving in a direction (rewinding direction) opposite to the feeding direction of the wiping member 60 described later of the device 40.

  When the ink jet recording head 20 is moved to the maintenance unit, the ink jet recording head 20 is not moved, the nozzle surface wiping device 40 is raised, and the ink jet is performed by a known moving mechanism such as a rack and pinion or slide guide. The nozzle surface 21 may be wiped by moving the recording head 20 in the longitudinal direction (the width direction of the recording paper P).

  As shown in FIG. 2, the nozzle surface wiping device 40 includes a web-like wiping member 60 made of a woven fabric of polyester resin, nylon resin, etc., and a delivery roll 42 around which one end side of the wiping member 60 is wound. The other end side of the wiping member 60 is wound, and the wiping member 60 is brought into contact with the nozzle surface 21 with the winding roll 44 rotationally driven at a constant delivery speed by the rotational driving force from the delivery motor (not shown). In order to support the wiping member 60 from below, a support roll 50 as an example of a rotary roll is included.

  That is, in the nozzle surface wiping device 40, the rotating shaft 44A of the take-up roll 44 is rotationally driven in the feeding direction (counterclockwise direction in the drawing) by the rotation driving of the feeding motor. 42, it moves (rolls out) toward the winding roll 44 via the support roll 50. The rotation shaft 42A of the delivery roll 42 is capable of free rotation.

  Further, the nozzle surface wiping device 40 is provided with a pair of guide rolls 56, 58 on which the wiping member 60 is wound from above, on the upstream side and downstream side of the support roll 50 in the delivery direction of the wiping member 60. The nozzle surface wiping device 40 includes a pair of tension rolls 52, 54 between which the wiping member 60 is wound from below, between the support roll 50 and the pair of guide rolls 56, 58.

  Furthermore, the nozzle surface wiping device 40 is provided with a guide roll 46 on which the wiping member 60 is wound from above on the downstream side of the guide member 58 in the delivery direction of the wiping member 60. On the downstream side in the feeding direction, the wiping member 60 is provided with a guide roll 48 on which the wiping member 60 is wound from below. The guide rolls 46, 48, 56, 58, the tension rolls 52, 54 and the support roll 50 are configured to rotate as the wiping member 60 moves.

  Further, as shown in FIG. 3A, at both axial end portions of the support shaft 50A of the support roll 50, an urging means for urging the support roll 50 upward (nozzle surface 21). A pair of coil springs 62 are provided as an example. That is, the upper end of each coil spring 62 is attached to each end of the support shaft 50A in the axial direction, and the lower end of each coil spring 62 rotatably supports the delivery roll 42, the winding roll 44, etc. Is attached to a portion (not shown) of the main body 68 (see FIG. 2).

  Further, as shown in FIG. 3, a storage member 66 in which the cleaning liquid S is stored is disposed below the support roll 50. As shown in FIGS. 3A and 3B, the support roll 50 in a state in which the wiping member 60 is not wound is not immersed in the cleaning liquid S in the storage member 66 due to the biasing force of the coil spring 62. It is supposed to be.

  Then, as shown in FIG. 3C, the wiping member 60 is pressed against the nozzle surface 21 of the ink jet recording head 20 in a state where the wiping member 60 is wound, and the biasing force of the coil spring 62 is exerted. The lower part is immersed in the cleaning liquid S in the storage member 66 by lowering (relative to the storage member 66) relatively.

  As shown in FIG. 3C, the outer peripheral surface (surface) of the support roll 50 is configured to be capable of holding the cleaning solution S, and is configured to be capable of supplying the cleaning solution S to the wiping member 60. Further, in the storage member 66, the cleaning solution S is constantly replenished by a supply path leading to the inside of the storage member 66 and a pump (both not shown). The supply means 64 according to the present embodiment is configured by the supply path, the pump, and the storage member 66.

[Frame member]
As shown in FIG. 2, the frame member 70 is provided adjacent to one end of the ink jet recording head 20 in the longitudinal direction without a gap on the one end side (maintenance part side) of the ink jet recording head 20 in the lengthwise direction. There is. The frame member 70 and the ink jet recording head 20 are configured to be reciprocally movable in the longitudinal direction.

  The length of the lower surface 71 of the frame member 70 in the longitudinal direction is equal to or greater than the circumferential length of the support roll 50. The lower surface 71 of the frame member 70 and the nozzle surface 21 of the inkjet recording head 20 It is arranged at the same height position. Furthermore, the lower surface 71 of the frame member 70 is configured to have friction (sliding resistance) with respect to the wiping member 60.

  Therefore, the wiping member 60 is moved by bringing the wiping member 60 into contact with the lower surface 71 of the frame member 70 continuous with the nozzle surface 21 of the ink jet recording head 20 and moving the frame member 70. Thus, before the start of wiping of the wiping member 60 with respect to the nozzle surface 21 of the ink jet recording head 20, the moving amount (rewinding amount) of the wiping member 60 can be adjusted.

  That is, when the wiping of the nozzle surface 21 of the inkjet recording head 20 is started, as shown in FIG. 6, the wiping member 60 is disposed at the first boundary D1 between the nozzle surface 21 of the inkjet recording head 20 and the lower surface 71 of the frame member 70. The system control unit 23 moves the frame member 70 so as to arrange the second boundary D2 between the used area U (indicated by dots in FIG. 6) and the unused area F1 (indicated by hatching in FIG. 6). The movement amount of the member 60 is controlled.

<Nozzle surface wiping method>
Next, the operation (nozzle surface wiping method) of the inkjet recording device 10 including the nozzle surface wiping device 40 and the frame member 70 according to the present embodiment configured as described above will be described.

  First, the nozzle surface wiping device 140 according to the comparative example shown in FIG. 9 will be described. As shown in FIG. 9, in the nozzle surface wiping device 140, a cleaning liquid is applied to spray the cleaning liquid S against the wiping member 160 stretched between the support roll 150 and the upstream tension roll 152. The nozzle 100 is disposed.

  Therefore, when the cleaning liquid S is sprayed from the cleaning liquid deposition nozzle 100 in this maintenance, the cleaning material S on the upstream side in the delivery direction of the wiping member 160 from the site where the cleaning liquid S is sprayed (hereinafter referred to as "wet start position 160A"). It is wetted (in FIG. 9, the area to be wetted by the cleaning liquid S of the wiping member 160 is indicated by a dot).

  That is, the wiping operation of the wiping member 160 with respect to the nozzle surface 21 of the ink jet recording head 20 is started after the wetting start position 160A comes to the upper end of the support roll 150. Here, the range from the upper end of the wiping member 160 which is pushed up by the support roll 150 to come into contact with the nozzle surface 21 in the delivery direction downstream side (tension roll 154 side) is the use area U used in the previous maintenance (Indicated by hatching in FIG. 9).

  Further, an area G (shown in white in FIG. 9) on the upstream side of the upper end of the wiping member 160 in the delivery direction and on the downstream side of the wetting start position 160A in the delivery direction is an unused area. Since the time has elapsed since the maintenance of the cleaning solution S, the cleaning solution S has evaporated and dried.

  Therefore, when the maintenance of this time is started in this state, the region G on the upstream side of the upper end of the wiping member 160 in the delivery direction and on the downstream side of the wetting start position 160A is the nozzle surface 21 of the inkjet recording head 20. It is idled in a non-contact state and is wasted (not used for the wiping operation).

  In this embodiment, the empty feed amount (a portion of the region G which is not used for the wiping operation in the wiping member 160) is reduced, in other words, the feeding direction from the second boundary portion D2 In the upstream wiping member 60, the wiping member 60 is moved in the rewinding direction by the lower surface 71 of the frame member 70 so that the portion which is not wetted by the cleaning liquid S is reduced (the amount of unwinding of the wiping member 60 is adjusted) . This will be described below.

  As shown in FIG. 4, at the time of the previous maintenance, after the wiping operation on the nozzle surface 21 is finished, the unused area F1 of the wiping member 60 (indicated by hatching in FIGS. 4 to 8) by a predetermined amount described later. Is shown). In the present embodiment, as shown in FIGS. 4 to 8, the delivery direction upstream side of the unused region F1 is set as the unused region F2 (shown by white in FIG. 4 to FIG. 8). It distinguishes from the unused area F1 which was paid out at the time of maintenance.

  As shown in FIGS. 4 and 5, the wiping member 60 in this state is pressed against the lower surface 71 of the frame member 70, and the ink jet recording head 20 and the frame member 70 are moved in the direction of arrow B in the drawing. Then, due to the friction (sliding resistance) between the lower surface 71 of the frame member 70 and the wiping member 60, the wiping member 60 moves in the rewinding direction opposite to the feeding direction.

  At this time, since the lower part of the support roll 50 is immersed in the cleaning liquid S stored in the storage member 66, along with the clockwise rotation of the support roll 50 in the figure, The cleaning solution S is held in the rotational direction upstream portion 50C (see FIG. 5). Then, with the rotation of the support roll 50 in the clockwise direction in the figure, a part of the unused area F1 of the wiping member 60 wound around the support roll 50 (shown by the area W in FIG. 5) The cleaning liquid S held on the rotation direction upstream portion 50C of the outer peripheral surface of the support roll 50 is supplied.

  Thereafter, the feeding motor is rotationally driven at a predetermined timing while the ink jet recording head 20 and the frame member 70 are moved in the direction of the arrow B shown in the drawing. That is, the take-up roll 44 is rotated to feed the wiping member 60 in the delivery direction. Then, as shown in FIG. 6, the lower portion of the support roll 50 is immersed in the cleaning solution S stored in the storage member 66, so that the support roll 50 rotates in the counterclockwise direction as illustrated. Accordingly, the cleaning solution S is held on the rotation direction upstream portion 50B of the outer peripheral surface.

  Then, with the rotation of the support roll 50 in the counterclockwise direction shown in the figure, the remaining part of the unused area F1 of the wiping member 60 wound around the support roll 50 (indicated by the area W in FIG. The cleaning solution S held in the rotation direction upstream portion 50B of the outer peripheral surface of the support roll 50 is supplied to the portion on the upstream side of the feeding direction with respect to the portion being carried out.

  As a result, the cleaning solution S is supplied to the entire unused area F1 of the wiping member 60, and the supporting roll 50 further rotates in the counterclockwise direction in the drawing, whereby the cleaning solution S is also supplied to the unused area F2 of the wiping member 60. Be done. That is, as shown in FIG. 7, the cleaning liquid S is supplied from the second boundary D2 between the used area U and the unused area F1 to the wiping member 60 on the upstream side in the delivery direction, and the cleaning member to which the cleaning liquid S is supplied. At 60, the nozzle surface 21 is wiped away.

  Thus, according to the nozzle surface wiping device 40 and the frame member 70 according to the present embodiment, the nozzle surface wiping device 140 according to the comparative example shown in FIG. 9 is wasted without being used for the wiping operation. A part (area G) of the wiping member 160 can also be used. That is, according to the present embodiment, the second boundary D2 which is the downstream end of the discharge direction wetted by the cleaning liquid S reaches the first boundary D1 as compared with the nozzle surface wiping device 140 according to the comparative example. Waste (blank feed amount) of the wiping member 60 is reduced or eliminated as compared with the case where the wiping operation is started in the absence state).

  Further, when the nozzle surface 21 is wiped with the wiping member 60 impregnated with the washing solution S, contaminants and the like remaining on the nozzle surface 21 are efficiently removed (cleaned), and the sliding resistance of the wiping member 60 against the nozzle surface 21 Is reduced. Therefore, damage (abrasion deterioration) to the water repellent film on the nozzle surface 21 is also suppressed.

  Thus, when cleaning (wipe) of the entire nozzle surface 21 by the wiping member 60 is completed, as shown in FIG. 8, the system control unit 23 rotationally drives the feeding motor (winding roll 44) to perform the next maintenance. For this purpose, the unused area F1 (indicated by the hatching in FIG. 8) of the wiping member 60 is advanced by a predetermined amount (so that the second boundary D2 is positioned at the predetermined delivery position).

  Thereby, at the time of the next maintenance, wiping is performed as compared with the case where the unused area F1 of the wiping member 60 is fed by a predetermined amount (so that the second boundary D2 is positioned at the predetermined delivery position). The waiting time to start is shortened. By the above, the maintenance operation by the nozzle surface wiping device 40 is completed.

  Note that “predetermined amount (predetermined delivery position)” in the present embodiment means that the cleaning fluid S is supplied to the delivery direction downstream side (usage region U) from the second boundary D2 at the next maintenance It is an amount necessary to enable supply of the cleaning solution S from the second boundary D2 to the upstream side in the feeding direction, such as the circumferential length of the support roll 50 and the depth of the cleaning solution S in the storage member 66 Is an amount determined appropriately by

  Further, as described above, in the present embodiment, the cleaning liquid S is not supplied directly to the wiping member 60 but is supplied via the support roll 50. Therefore, compared to the nozzle surface wiping device 140 according to the comparative example shown in FIG. 9, waste of the wiping member 60 (a region G which can not be wet by the cleaning liquid S and is not used for the wiping operation) is reduced.

  Further, in the present embodiment, the length of the lower surface 71 of the frame member 70 is equal to or longer than the circumferential length of the support roll 50. Therefore, as compared with the case where the length of the lower surface 71 of the frame member 70 is shorter than the circumferential length of the support roll 50, the wiping start position of the wiping member 60 with respect to the nozzle surface 21 is easily adjusted.

  The length of the lower surface 71 of the frame member 70 may be shorter than the circumferential length of the support roll 50. In that case, a rewind motor (not shown) may be provided on the rotation shaft 42A of the delivery roll 42. That is, when the wiping member 60 is rewound by a predetermined amount, when the length of the lower surface 71 of the frame member 70 is insufficient, the rotational driving force of the rewind motor causes the rotation shaft 42A of the delivery roll 42 to be rewound It may be rotated (clockwise in FIG. 2).

  Thereby, the same operation and effect as the above embodiment can be obtained. At this time, the rotating shaft 44A of the take-up roll 44 can freely rotate in the clockwise direction in FIG. 2 so that the wiping member 60 can be rewound to the delivery roll 42. In addition, when the length of the lower surface 71 of the frame member 70 is shorter than the circumferential length of the support roll 50, the length of the inkjet recording apparatus 10 is larger than that of the circumferential length of the support roll 50 or more. There is an advantage that downsizing can be achieved.

  Further, the storage member 66 is disposed so that the lower part of the support roll 50 can be immersed in the cleaning liquid S when the wiping member 60 is pressed against the nozzle surface 21 and the support roll 50 is relatively lowered. Therefore, for example, as compared with the case where the cleaning solution S is sprayed and supplied to the lower part of the support roll 50, the cleaning solution S is supplied to the support roll 50 without unevenness. In addition, compared with the case where the storage member 66 is raised by the elevating mechanism to supply the cleaning liquid S to the lower portion of the support roll 50, the configuration of supplying the cleaning liquid S to the support roll 50 is simplified.

  The nozzle surface wiping device 40 and the inkjet recording device 10 according to the present embodiment have been described above based on the drawings, but the nozzle surface wiping device 40 and the inkjet recording device 10 according to the present embodiment are limited to those illustrated. However, the design can be changed as appropriate without departing from the scope of the present invention. For example, the supply means 64 is not limited to the illustrated one.

  In addition, the inkjet recording apparatus 10 according to the present embodiment is limited to those used for recording characters and images on the recording paper P, such as recording apparatuses used as output devices such as copying machines, printer multifunction machines, and workstations. It is possible to apply, for example, to the production of a color filter for a display by discharging a coloring ink onto a polymer film or glass.

  That is, the “recording medium” in the present embodiment includes, in addition to the recording paper P, for example, a substrate on which an OHP sheet, a wiring pattern, and the like are formed. Then, in the “image” in the present embodiment, not only a general image (character, picture, photograph, etc.) but also a dot pattern (wiring pattern) obtained by ink droplets being landed on the recording medium, etc. Also included.

10 Inkjet Recording Device (One Example of Droplet Discharge Device)
20 Ink jet recording head (an example of a droplet discharge head)
21 nozzle face 23 system control unit (an example of a control unit)
40 Nozzle surface wiping device 50 Support roll (an example of a rotating roll)
60 wiping member 64 supply means 66 storage member 70 frame member D1 first boundary portion D2 second boundary portion

Claims (7)

A wiping member configured to be movable in a delivery direction and a reverse direction opposite thereto, and wiping the nozzle surface of the droplet discharge head with relative movement with the droplet discharge head;
A rotating roll which brings the wiping member into contact with the nozzle surface while contacting and rotating the wiping member from below;
Supply means for supplying a cleaning liquid to the rotating roll;
A nozzle surface wiping apparatus for a droplet discharge head comprising:   The nozzle surface wiping apparatus for a droplet discharge head according to claim 1, wherein the supply unit is configured by a storage member that stores the cleaning solution so that the lower portion of the rotating roll can be immersed.   3. The nozzle surface wiping apparatus for a droplet discharge head according to claim 2, wherein the supply means immerses the lower portion of the rotating roll in the cleaning liquid by the wiping member being pressed against the nozzle surface and relatively lowered. . The nozzle surface wiping device according to any one of claims 1 to 3.
A droplet discharge head which moves relative to the nozzle surface wiping device in the rewinding direction;
The droplet discharge head is disposed adjacent to the droplet discharge head such that the lower surface having a length equal to or greater than the circumferential length of the rotating roll is at the same height position as the nozzle surface, and continuous to the relative movement of the droplet discharge head A frame member with which the wiping member is in contact;
Droplet discharge device equipped with The nozzle surface wiping device according to any one of claims 1 to 3.
A droplet discharge head which moves relative to the nozzle surface wiping device in the rewinding direction;
The droplet discharge head is disposed adjacent to the droplet discharge head such that the lower surface having a length shorter than the circumferential length of the rotating roll is at the same height position as the nozzle surface, and the relative movement of the droplet discharge head is A frame member which is continuously in contact with the wiping member;
Droplet discharge device equipped with   At the start of wiping of the nozzle surface of the droplet discharge head, at a first boundary between the nozzle surface of the droplet discharge head and the lower surface of the frame member, a second boundary between a used region of the wiping member and an unused region The cleaning liquid is disposed upstream of the second boundary portion in the delivery direction of the wiping member, and the area downstream of the wiping member in the delivery direction with respect to the portion to which the cleaning liquid is supplied by the supply unit. The droplet discharge device according to claim 4 or 5, further comprising: a control unit configured to control movement of the wiping member with respect to the frame member so as to be wetted with the liquid.   The liquid according to claim 6, wherein the control unit controls the movement of the wiping member such that the second boundary portion is positioned at a predetermined delivery position after wiping of the nozzle surface of the droplet discharge head is completed. Drop discharge device.